Top Definition
The sexual act of a Jewish couple in which the male ejaculates into a small shot glass which is place on the womens vagina/other partners genitalia. It is then covered in a napkin or cloth then stepped on and broken by the man. After the act is complete, the couple must yell, "Mazeltov!"
News Caster : Recently a Rabbi was arrested for molesting a young school boy.

Bill : I hear he did the act of "Israeli Mayonnaise" on the young child.

Ted : That's just sick.
by The_Rabbi_Rock'n'Roll August 06, 2010

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